diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index c683271f05576..67a8393e3f86a 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1117,7 +1117,7 @@ static void make_request(struct mddev *mddev, struct bio * bio)
 			/* Could not read all from this device, so we will
 			 * need another r10_bio.
 			 */
-			sectors_handled = (r10_bio->sectors + max_sectors
+			sectors_handled = (r10_bio->sector + max_sectors
 					   - bio->bi_sector);
 			r10_bio->sectors = max_sectors;
 			spin_lock_irq(&conf->device_lock);
@@ -1125,7 +1125,7 @@ static void make_request(struct mddev *mddev, struct bio * bio)
 				bio->bi_phys_segments = 2;
 			else
 				bio->bi_phys_segments++;
-			spin_unlock(&conf->device_lock);
+			spin_unlock_irq(&conf->device_lock);
 			/* Cannot call generic_make_request directly
 			 * as that will be queued in __generic_make_request
 			 * and subsequent mempool_alloc might block